XML 79 R67.htm IDEA: XBRL DOCUMENT v3.21.2
ACCRUED WARRANTY (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
ACCRUED WARRANTY    
Beginning accrued warranty costs $ 68,000 $ 30,000
Provision for warranty expense 3,762 101,041
Settlement of warranty claims (3,762) (63,041)
Ending accrued warranty costs $ 68,000 $ 68,000